First slide

Force on a charged particle moving in a magnetic field

Question

Statement 1: The energy of charged particle moving in a uniform magnetic field does not change.
Statement 2: Work done by magnetic field on the charge is zero.

Easy

A

Both statements 1 and 2 are correct
B

Statement 1 is correct statement 2 is incorrect
C

Statement 1 is incorrect statement 2 is correct
D

Both statements 1 and 2 are incorrect

Solution

The force on a charged particle moving in a uniform magnetic field always acts in direction perpendicular to the direction of motion of the charge. As work done by magnetic field on the charge is zero, $[W = FS \cos θ],$ so the energy of the charged particle does not change.

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